Marshall, R. B.  1867-1949 <br/><br/>
Results of spirit leveling in Ohio, 1911. 
R. B. Marshall, chief geographer; work done in cooperation with the state of Ohio, C. E. Sherman, inspector. 
 - Washington,  Govt. Print. Off.,  1912. 
 - 108 p.  pl.  24 cm. 
 - U.S. Geological survey. Bulletin 518 .
 - United States.  Geological Survey.  Bulletin ;  518. .
<br/><br/> Includes index. 
<br/><br/><label>LCCN: </label>gs 12000754  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Ohio--Altitudes.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 518